Subject: SES Light and Reduced Engine Power DTC P0120 P0220 P1516 P2135 Models: 2004-2006 Buick Rainer 2005-2006 Cadillac CTS-V 2003-2006 Cadillac Escalade 2003-2006 Chevrolet Avalanche, Corvette, Express, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer 2003-2006 GMC Envoy, Savana, Sierra, Yukon 2003-2006 Hummer H2 2005-2006 … If you are concerned about mechanical issues with the new 2016 Chevy Silverado, remember that the complimentary Chevrolet Complete Care program comes standard with every new Chevy. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. Code reader shows po641 which is a 5 volt circuit reference. Replaced the throttle body entirely. 11 Silverado 1500, been throwing a code where it cuts off power, and traction control and stabilitrak are shut off. Aug 23 2014, 6:22pm. I have read around the net, and this is what I have done so far: Replaced APP, Ohmed out the wiring between the TAC and the APP then the TAC and the TPS. Misfire, Reduced Engine Power. 2004 Chevy Silverado 2500HD 6.0L Gas. Chevrolet Silverado Misfire Reduced Power and Catalytic Converter. I purchased this vehicle used from auction with 248K and it started tripping this u0107 code from the get go. When a component on the system fails, the truck is forced to drive in reduced engine power mode. We have tried these methods to fix it: 1. replaced the accelerator and the sensor. The P1516 engine code refers to the drive-by-wire system on your Chevrolet Silverado 1500. I can shut off engine and let sit for 30 seconds and re fire and keep going with 0 issue. I was on the highway driving and pulled off into a mall and my check engine light came on and the truck started missfiring and sputtering like it … Since owning the truck I have had little to no problems until about three weeks back. That means that basic repairs and any freak mechanical errors will be covered for up to five years at low or minimal cost to you. Our truck is a 2004 Sierra 2500hd and for the past year, the reduced engine power message with the check engine light has been coming on and causing issues. I went to drive truck from auction house and thought I would drive it home but I made it out the gate and traveled about 3 miles limping with no power at 5-10 mph. Misfire, Reduced Engine Power. Question: I have a 2004 Chevy Silverado which i just purchased today. Subject:SES Light and Reduced Engine Power DTC P0120 P0220 P1516 P2135 Models:2004-2006 Buick Rainer 2005-2006 Cadillac CTS-V 2003-2006 Cadillac Escalade 2003-2006 Chevrolet Avalanche, Corvette, Express, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer 2003-2006 GMC Envoy, Savana, Sierra, Yukon 2003-2006 Hummer H2 2005-2006 … I have purchased a 2004 2500 crew cab 6.0 with the ally trans. Codes p2135 p1516 p0220 I have 2004 Tahoe that goe into reduced engine power and stability control diabled while driving. 2. Replaced the wiring harness to the throttle body. 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